Delco Remy Starter Motor 24V 12 Tooth CW 42MT 1990366

This Delco Remy starter motor is a 24V unit in the 42MT series, built with 12 teeth, clockwise rotation, and an 8.0kW power rating. The listed part number is 1990366, and it is supplied as a new starter motor with a one year warranty.

Physical dimensions matter with starter motors, and this unit is clearly defined: 490mm overall length, 92mm flange diameter, 126mm mount centres A, B and C, 16mm mount hole diameter, and a 46mm pinion diameter. It also has a pinion at rest measurement of 48mm and uses a 3 hole starter mount type.

The unit is listed for wet or dry clutch applications and includes insulated return. It is a Delco Remy branded rotating electrical component, sold each, and weighs 27.8kg, so confirming the mounting arrangement and physical clearance before ordering is important.

Key Features

• 24V starter motor
• 42MT series
• 12 tooth pinion
• Clockwise rotation
• 8.0kW power rating
• Insulated return

Specifications

• Brand: Delco Remy
• Part No.: 1990366
• Product type: Starter motor
• Voltage: 24V
• Power rating: 8.0kW
• Series: 42MT
• Rotation: CW
• Number of teeth: 12

Known fitment references

• Atlas Copco F9C
• Case W18
• Case W20
• Caterpillar 12G
• Caterpillar 12H
• Caterpillar 12K
• Caterpillar 12M
• Caterpillar 120G

Application and Buying Notes

Before buying, compare the part number 1990366 and the starter specification set against the unit already fitted to the machine. The key points to check are 24V, 12 tooth, clockwise rotation, 42MT series, and the 3 hole mounting pattern with 126mm mount centres.

The physical dimensions are just as important as the electrical rating. This starter is 490mm long with a 92mm flange diameter, 46mm pinion diameter, and 48mm pinion at rest, so clearance around the housing and engagement depth need to suit the application.

Because this is a 27.8kg starter motor, handling and installation should be planned accordingly. Confirm the mounting holes are 16mm and that the mounting face and surrounding components allow for the 126mm centres and overall length before fitting.

Before supply, the safest approach is to confirm the original unit details against the listed part number, voltage, output rating, mounting arrangement, and pulley configuration. That checking process is standard practice in the parts trade because visually similar units can still differ in service-critical ways.

For workshop, fleet, and equipment applications, accurate identification of part number 1990366 helps avoid unnecessary freight, additional labour, and vehicle or machine downtime. Where the application is not straightforward, the original unit, OEM reference, or workshop records should be used as the primary confirmation point.

Relevant published details for this unit include Type STARTER MOTOR, Unit of Measure EACH, Warranty One Year, Mount Centres A 126mm, Mount Centres C 126mm, Number of Teeth 12, Pinion at Rest 48mm, Power Rating 8.0kW, Series 42MT, Voltage 24.

Additional published details for cross-checking include Starter Mount Type 3 Hole, Weight 27.8kg, Product Group 1 ROTATING ELECTRICAL, Part No. 1990366, Brand DELCO REMY, Description Delco Remy Starter Motor 24V 12Th CW 42MT, Flange Diameter 92mm, Mount Centres B 126mm, Mount Hole Diameter 16, Overall Length 490mm.

Delco Remy Starter Motor 24V 12Th CW 42MT. Part number 1990366 should be checked first. Listed voltage is 24. These details form the core reference points used by parts interpreters when confirming the correct replacement.

For part number 1990366, the normal identification sequence is part number, electrical rating, mounting arrangement, connector or terminal style, and pulley or drive details. Using those checkpoints helps confirm that the listed unit matches the service requirement rather than only looking similar.

For a starter motor in workshop, fleet, trade, agricultural, or construction service, the listed voltage 24 should be checked carefully. Incorrect selection can affect installation time, return freight, and equipment availability.

Available application references include ATLAS COPCO F9C, CASE W18, CASE W20, CATERPILLAR 120G, CATERPILLAR 120H, CATERPILLAR 120K. Even with application listings, final confirmation should still be based on the exact unit being replaced and the service requirements of the vehicle or machine.

The listed warranty is One Year. Warranty terms should be considered alongside correct application and part identification, as warranty does not replace fitment confirmation.

Compatibility note: Confirm compatibility using part number 1990366, the 24V electrical requirement, 12 tooth CW configuration, 42MT series, and the listed mounting and dimensional measurements before purchase.

FAQ

What is the part number for this Delco Remy starter motor?

The listed part number is 1990366. For this listing, part number 1990366 is the main reference point. Listed voltage is 24. Published fitment references include ATLAS COPCO F9C, CASE W18, CASE W20. These details should still be checked against the original unit before ordering.

Is this a 12V or 24V starter motor?

It is a 24V starter motor. For this listing, part number 1990366 is the main reference point. Listed voltage is 24. Published fitment references include ATLAS COPCO F9C, CASE W18, CASE W20. These details should still be checked against the original unit before ordering.

What rotation does this starter use?

It is clockwise rotation, listed as CW. For this listing, part number 1990366 is the main reference point. Listed voltage is 24. Published fitment references include ATLAS COPCO F9C, CASE W18, CASE W20. These details should still be checked against the original unit before ordering.

How many teeth does the pinion have?

The starter is listed with 12 teeth. For this listing, part number 1990366 is the main reference point. Listed voltage is 24. Published fitment references include ATLAS COPCO F9C, CASE W18, CASE W20. These details should still be checked against the original unit before ordering.

What mounting details are provided?

The starter uses a 3 hole mount type, with mount centres A, B and C all listed at 126mm, and mount hole diameter listed at 16mm. For this listing, part number 1990366 is the main reference point. Listed voltage is 24. Published fitment references include ATLAS COPCO F9C, CASE W18, CASE W20. These details should still be checked against the original unit before ordering.

Is this a new or remanufactured unit?

It is listed as a new starter motor. For this listing, part number 1990366 is the main reference point. Listed voltage is 24. Published fitment references include ATLAS COPCO F9C, CASE W18, CASE W20. These details should still be checked against the original unit before ordering.